#include<bits/stdc++.h>
#define inf 1e9
#define eps 1e-6
#define FOR(i, a, b) for(int i = a; i <= b; i ++)
#define REP(i, a, b) for(int i = a; i >= b; i --)
#define pb push_back
#define fr first
#define sd second
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
inline ll read()
{
	char ch = getchar();
	ll s = 0, w = 1;
	while (ch < '0' || ch > '9') {if (ch == '-')w = -1; ch = getchar();}
	while (ch >= '0' && ch <= '9') {s = s * 10 + ch - '0'; ch = getchar();}
	return s * w;
}
#define int ll
const int mod = 998244353;
int x, l, r;
int ans;
bool ck(const int x) {return (l <= x && x < r);}
int calc(int L, int R, int n)
{
	if (L > n)return 0;
	return min(n, R) - L + 1;
}
int sol(int R)
{
	int sum = 0;
	for (int a = 1;; a ++)
	{
		if (a * a * a * a > x)break;
		for (int b = a + 1;; b ++)
		{
			if (a * b * b * b > x)break;
			int tx = x / a / b;
			int lc = b + 1, rc = sqrt(tx);
			while(rc >= tx / rc)rc --;
			if (lc > rc)continue;
			// cout << "GG:" << a << ' ' << b << ' ' << lc << ' ' << rc << endl;
			if (a + b <= R)sum = (sum + rc - lc + 1) % mod; // ab
			// cout << "EE:" << sum << endl;
			sum = (sum + calc(a + lc, a + rc, R)) % mod; // ac
			// cout << "EE:" << sum << endl;

			int ql, qr, pos;
			ql = lc, qr = rc, pos = rc + 1;
			while (ql <= qr)
			{
				int mid = (ql + qr) >> 1;
				if (tx / mid + a <= R)pos = mid, qr = mid - 1;
				else ql = mid + 1;
			}
			sum = (sum + rc - pos + 1) % mod; // ad
			// cout << "EE:" << sum << endl;

			sum = (sum + calc(b + lc, b + rc, R)) % mod;// bc
			// cout << "EE:" << sum << endl;

			ql = lc, qr = rc, pos = rc + 1;
			while (ql <= qr)
			{
				int mid = (ql + qr) >> 1;
				if (tx / mid + b <= R)pos = mid, qr = mid - 1;
				else ql = mid + 1;
			}
			sum = (sum + rc - pos + 1) % mod; // bd
			// cout << "EE:" << sum << endl;

			ql = lc, qr = rc, pos = rc + 1;
			while (ql <= qr)
			{
				int mid = (ql + qr) >> 1;
				assert(mid < rc || tx / mid + mid >= tx / (mid + 1) + (mid + 1));
				if (tx / mid + mid <= R)pos = mid, qr = mid - 1;
				else ql = mid + 1;
			}
			sum = (sum + rc - pos + 1) % mod; // cd
			// cout << "EE:" << sum << endl;
		}
	}
	return sum;
}
signed main()
{
	// freopen("C.in", "r", stdin);
	// freopen("C.out", "w", stdout);
	x = read(), l = read(), r = read();
	// cerr << sol(r - 1) << ' ' << sol(l - 1) << endl;
	cout << 4LL * (sol(r - 1) + mod - sol(l - 1)) % mod << '\n';
	return 0;
}